Spindle key



FIG. 1 is a top perspective view of a spindle key showing our new design;

FIG. 2 is a left side view thereof, the right side view being a mirror image of the left side view;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in the drawings represent portions of the spindle key that form no part of the claimed design. 

CLAIM The ornamental design for a spindle key, as shown and described. 